Can anybody start a new project?

I want to install CoreUI (npm). I tested it with the Free version, unfortunately that didn’t work, so I bought CoreUI including icons - but it doesn’t work either. I can not install / start projects - I always get the following error:

Not Found - GET https://registry.npmjs.org/path-exists/-/path-exists-4.0.1.tgz 2 - Not found

Can someone help me please? Am I doing something wrong or does the software have a bug?